Hi
We have a power edge 2900 server running over two MD1000 enclosures linked to PERC 5/E controller.
each array is linked to a separate connector on the controller.
each array has 15 disks, every 7 disks build a virtual disk and one remaining disk is hot spare.
Not sure if The used RAID is RAID 5 or RAID 50
one month ago, our technician replaced a disk on 2nd enclosure, afterwards a sudden failure happened to all physical disks of the enclosure array causing all virtual drives to become failed.
I am trying to investigate what happened by reviewing the event log, I could reach the moment of failure which is:
"An enclosure management module (EMM) has been removed.: Enclosure 1:0 Controller 1, Connector 1"
and then a group of following messages:
Physical disk removed: Physical Disk 1:0:14 Controller 1, Connector 1
Communication with the enclosure has been lost.: Enclosure 1:0 Controller 1, Connector 1
Redundancy lost: Virtual Disk 2 (Vol4) Controller 1 (PERC 5/E Adapter)
Virtual disk degraded: Virtual Disk 2 (Vol4) Controller 1 (PERC 5/E Adapter)
Redundancy lost: Virtual Disk 3 (Vol5) Controller 1 (PERC 5/E Adapter)
Virtual disk degraded: Virtual Disk 3 (Vol5) Controller 1 (PERC 5/E Adapter)
Device failed: Physical Disk 1:0:14 Controller 1, Connector 1
Physical disk removed: Physical Disk 1:0:13 Controller 1, Connector 1
Virtual disk failed: Virtual Disk 2 (Vol4) Controller 1 (PERC 5/E Adapter)
SAME MESSAGE FOR ALL DISKS OF ENCLOSURE 2 DISK 1:0:X
Virtual disk failed: Virtual Disk 3 (Vol5) Controller 1 (PERC 5/E Adapter)
I also noticed the following message:
The previous system shutdown at 1:57:08 PM on 9/24/2014 was unexpected.
My question/s:
1- what could have happened at that moment which caused the system seeing the EMM as been removed? (is it a sudden power down of server, sudden power down of storage, unexpected shutdown because of incompatible disk firmware??).
2- the current situation now that all disks of the array are foreign, does this mean we have lost the data?
3- how can we fix this situation?
4- I noticed that when one physical disk is failed the two virtual disks defined in same enclosure both get degraded. is this normal with RAID5? Or it means a RAID 50 was configured?
Regards